71995198 has 32 divisors (see below), whose sum is σ = 123628032. Its totient is φ = 31125600.

The previous prime is 71995193. The next prime is 71995223. The reversal of 71995198 is 89159917.

It is a happy number.

Its product of digits (204120) is a multiple of the sum of its prime divisors (840).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71995193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132808 + ... + 133348.

It is an arithmetic number, because the mean of its divisors is an integer number (3863376).

Almost surely, 2^71995198 is an apocalyptic number.

71995198 is a deficient number, since it is larger than the sum of its proper divisors (51632834).

71995198 is a wasteful number, since it uses less digits than its factorization.

71995198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 204120, while the sum is 49.

The square root of 71995198 is about 8484.9984089568. The cubic root of 71995198 is about 416.0075157358.

The spelling of 71995198 in words is "seventy-one million, nine hundred ninety-five thousand, one hundred ninety-eight".